Remote Sensing Products for Environmental Assessment at Offshore Platforms and Pipelines

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Adolf Brinkerhoff
vor 6 Jahren
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1 Remote Sensing Products for Environmental Assessment at Offshore Platforms and Pipelines Susanne Lehner, Thomas König Domenico Velotto, Stephan Brusch German Aerospace Center (DLR) Remote Sensing Technology Institute (IMF) Folie 1

2 SAR Ocean Remote Sensing ENVISAT Wind Sea State Oil Land-Water Line Bathymetry Sea Ice Folie 2

3 TerraSAR-X Imaging mode Folie 3

4 TSX Spotlight mode VV polarisation image acquired on May 15, 2009 at 17:19 UTC over Ekofisk oil platform Folie 4

5 S* 1-Dimensional Wave Spectra and Integral Parameters Red TSX spectrum blue Wamos spectrum wavenumber Hs(m) Tp1(s) Dir( ) Tp2(s) TSX WaMoS Buoy Folie 5

6 2-Dimensional Wave Spectra Wamos TSX 1 Folie 6

7 Wind Field for Ekofisk Platform March 12, 2009 at 05:58 UTC Spotlight mode Azimuth Resolution 1.7 m Range Resolution 1.6 m Folie 7

8 TS-X Stripmap data acquired on Feb.08, 2011 at 22:02 UTC; HH polarisation Pixel Size: 1.25 m Resolution: 3 m. Folie 8

9 Sea Surface Wind Speed over Wind Farming Park Homogenous wind direction input Box_size: 100 m Step_size: 50 m Folie 9

10 SAR Oil spill detection Smooth surface Slightly rough surface Very rough surface Oil not-detectable Oil-detectable Oil not-detectable Bragg scattering: B r 2sinθ at X-band (9.65 GHz) 20 θ 60 at C-band (5.30 GHz) B B [cm] Folie 10

11 Montara Oil Platform Timor Sea, 2009 Folie 11

12 Timor Sea oil spill mapping Drift indication combining different satellite sensors Folie 12

13 Deepwater Horizon Platform Gulf of Mexico explosion on April 20, 2010 (left) TSX ScanSAR image acquired on April 25, 2010 (right) DLR ZKI Deepwater Horizon Folie 13

14 North Sea Danish Oil and Gas Fields Monitored Area June-September 11 TS-X imagery: 25 SM mode: 12 SC mode: 13 source: Folie 14

15 Monitored Area TSX ScanSAR example TS-X ScanSAR VV-pol North Sea Time: :19 UTC TYRA FIELD GORM FIELD DAN FIELD Folie 15

16 Number of acquisition North Sea Danish Oil and Gas Fields Monitored Area Period June-September ' Number of imagery Number of possible spills 2011/06-1st 2011/06-2nd 2011/06-3rd 2011/06-4th 2011/07-1st 2011/07-2nd 2011/07-3rd 2011/07-4th 2011/08-1st 2011/08-2nd 2011/08-3rd 2011/08-4th 2011/09-1st 2011/09-2nd 2011/09-3rd 2011/09-4rd Folie 16

17 MonitoAred Area TSX StripMap example A D TS-X StripMap VV-pol North Sea Time: :10 UTC TS-X StripMap VV-pol North Sea Time: :07 UTC Folie 17

18 Ekofisk Platform - Study Case Ekofisk platform in North Sea Folie 18

19 2008/ / / / / / / / / / / / / / / / / / / / / / / / / /02 Number of acquisition Ekofisk Platform - Study Case Ekofisk Platform TOT= ACQUISITION DETECTION Folie 19

20 Gannet Alpha Oil spill Forties Field Gannet Alpha On 14th August 2011 an oil leak from the Gannet Alpha platform in North Sea Britain s water was found by Marine Scotland. It has been classified as significant spill and Britain s worst oil spill for over a decade. TS-X ScanSAR VV-pol North Sea Time: :37 UTC Folie 21

21 Summary Target Detection and Masking Wind fields, high resolution from TerraSAR-X Wave fields, integral parameters (Hs, Tp, etc.) 1- and 2-dimensional wave spectra Oil spill detection Discrimination from natural slicks for dual-polarized SAR (HH/VV) Rough estimation of the spill s age can be done using wind field history (to be improved by use of oil drift model) Folie 22

22 Thank you Folie 23

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